How to buy
A, temperature and humidity test box power supply selection, whether it is 220V or 380V are three-phase or more power interface, if the temperature is below -40 degrees, and the box is more than 225L, it is recommended to select the 380V four-phase power interface, because of this The power consumption of the entire laboratory is relatively stable, and it is also beneficial to the life of the equipment itself;
B, air-cooled and water-cooled box of constant temperature and humidity box: Air-cooled is generally enough. The water-cooled is a large-scale constant temperature and humidity chamber or a large box of rapid heating and cooling tester. The general cold and hot shock test box is water-cooled. More
C, the size of the constant temperature and humidity box, the general size is determined according to the size of the test product, according to the requirements of the national standard GB2423, the size of the test studio is greater than or equal to 3 times the test product, so that the test effect is the best , And your product is 300 wide and 180 long and 180 high MM, if the number of test products is not much, 408L (studio 600X850X800MM) is enough, of course, you can choose more, you can do multiple layers of test; In general, The size is selected on the basis that the maximum workpiece volume tested is one third of the chamber volume
D, compare the accessories used by different constant temperature and humidity cabinet manufacturers. Important accessories: one is the controller, one is the compressor, and the box material.
a, constant temperature and humidity chamber controller. The controller is like the brain of a constant temperature and humidity chamber. It is a very important component. It determines the result of the experiment. Before purchasing the constant temperature and humidity test chamber, you can go to the market to understand which of the mainstream controllers are available. After looking at the controllers used by the manufacturers, it is known that the constant temperature and humidity chambers are good or bad.
b, box material. Some companies have ambiguous lists of quotes, such as the shell only write "stainless steel", but for the layman may not be clear that there are many kinds of stainless steel, such as "201 stainless steel" will rust for a long time, the market price is relatively cheap;
c, constant temperature and humidity test chamber compressor. The quality of the compressor determines the cooling effect of the chamber, and the brand of the compressor used by the manufacturer should be taken into consideration when purchasing. Some manufacturers offer low prices, they often test unfamiliar compressors, shoddy, and even use second-hand compressors or refurbished compressors, such product quality can not be guaranteed, the purchase needs to be cautious!
E. Use environment: Especially for reliability test, the test cycle is long, and the object of the test is sometimes a very valuable military product. During the test process, testers often perform operations or test work around the site. Therefore, the environmental test equipment must be required. With the characteristics of safe operation, convenient operation, reliable use, long working life, etc., to ensure the normal operation of the test itself.
F, consider how big your own laboratory size is, this choice is very important. If the size does not fit. Buying back can't put the device into the lab.
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